O'Neill Men's Reactor USCG Life Vest

USCG Approved Personal Flotation Device; Perfect for Wake Sports, Waterskiing, Tubing, and Swimming Segmented Foam Core And Anatomical Flex Points Allow Unrestricted Movement Quick Release Safety Buckles And Heavy Duty Front Zipper Create an Unparalleled Sense of Security Minimal Bulk Design Allows Full Mobility, While Expansion Panels Enable a Comfortable Fit Relaxed Fit For The Water Sports Enthusiast Who Wants Some Room To Move Neoprene vests are meant to fit fairly snugly when dry.

It's important that they do fit snug.

When neoprene gets wet it expands so the in order for the vest to fit properly it needs to be snug.